LONDON PUPAE SUPPLIESSpecialist Breeders of Tropical Butterfly and Moth Pupae

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Sexing
Pupae

This is not something easily done and we do not do do it
as a rule, even where possible, as it can be too time consuming.
However, for those interested, the image below is an example
of how to tell the difference between male and female pupae
in one particular species, Danaus plexippus, the
Monarch:

At the suspending end of the pupae thee are a number of
dark lines. With a reasonable magnifying glass, the areas
indicated by the red circle can be made out and a difference
established - the female pupa has a line which entirely
bisects the two lines, whereas the male pupa has only a
dimple.